German Panzer II's and 37mm armed Panzer III's versus KV's. Germans tried to move off road to flank the KV's and got stuck in the soft ground. KV's 76.2mm would have zero problems penetrating PzII's and early PzIII's while nothing Germans had on site could pen KV's.

You get almost the same sort of fight with KV-1 and panthers or tigers, or shermans and tigers. Or potentially anything versus the Maus if it got going against any tanks on the WWII battlefied at the time.

And on the 135 hits, makes sense. Imagine a kv220 against a team of tier 4s without derp guns, driven by yellows. If they dont get the brain spark to flank it as a team they die one by one, every time.